A hotfix is available to change the behavior of the Full Mailbox Access permission in Exchange 2000 Server (915358)

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Currently, a user who has the Full Mailbox Access permission to a mailbox can send an e-mail message as the mailbox owner. This behavior occurs because the Send As permission is implicitly included in the Full Mailbox Access permission.

Microsoft has created a hotfix to change the default behavior of the Full Mailbox Access permission. After you apply this hotfix, you can set the Full Mailbox Access permission for a user without also setting the Send As permission.

Note This change is in Exchange 2000 Server Service Pack 3 (SP3) when you use Store.exe version 6619.4 or a later version of Store.exe.

For more information about a similar hotfix for Microsoft Exchange Server 2003, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

Because of file dependencies, this hotfix requires Microsoft Exchange 2000 Server Service Pack 3 (SP3). For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the Microsoft Exchange Information Store service and all of its dependant services are automatically stopped and then restarted when you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

File name	File version	File size	Date	Time	Platform
Mdbmsg.dll	6.0.6619.4	2,342,912	21-Feb-2006	02:42	x86
Store.exe	6.0.6619.4	4,714,496	21-Feb-2006	03:32	x86

MORE INFORMATION

The following user accounts are not affected by this hotfix:

• The user account of the mailbox owner
• The associated external user account for a mailbox
• The user account of a delegate of the mailbox owner

If any one of these user accounts has the Full Mailbox Access permission for a mailbox, the user can send e-mail messages as the mailbox owner. The user account does not have to have the Send As permission for the user to send an e-mail message as the mailbox owner. By default, the following user accounts have the Full Mailbox Access permission:

• The user account of the mailbox owner
• The associated external user account for a mailbox

By default, the user account of a delegate does not have the Full Mailbox Access permission.

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base: